Thread subject: Diptera.info :: Nematocera with modified antennae (Keroplatus testaceus?)
Posted by ebbek on 30-08-2016 16:15
#1
A Nematocera from an old beech forest in south Sweden today. Body length 8-9 mm. Thankful for any help to ID!
Edited by ebbek on 30-08-2016 18:46
Posted by ebbek on 30-08-2016 16:16
#2
Other view
Posted by ebbek on 30-08-2016 16:16
#3
And another
Posted by Juergen Peters on 30-08-2016 17:56
#4
Hello,
Keroplatus, Keroplatidae.
Posted by ebbek on 30-08-2016 18:38
#5
Many thanks! Three species are recorded from Sweden and thney are tipuloides, tuvensis and testaceus. When I check in Zaitsev (1991) i come to testaceus, but I am not sure I have reda the russian text correct....
If anybody knows rhese species I can try and get pictures of genitalia.
Best regards
Krister
Krister
Posted by Sundew on 31-08-2016 09:53
#6
It looks rather similar to mine (
http://www.dipter...d_id=75412) that has not yet been replied to, but the wing might be coloured a little more intensive. Nevertheless, if compared with the wing of
K. tipuloides in
http://sciaroidea...nomy/40615, it is much lighter. Unfortunately, there is no wing picture of
K. tuvensis in the net. However, I suppose we both got the frequent
K. testaceus...
Posted by Sundew on 31-08-2016 10:33
#7
Meanwhile I translated part of the description of
K. tuvensis by Zaitzev concerning the wing:
"Wings translucent, with dark spots. One is situated along the upper edge between the tips of Sc and R1. The second is below the upper third of R5 and units with the first in the region of branch-off of R4. On the lower wing edge there is a pale margin."
I do not see such clearly circumscribed dark spots. However, I could translate more parts of the description concerning other body parts, if you were interested in.
Posted by ebbek on 31-08-2016 20:41
#8
Thanks a lot for respons and translation! I am interested in more translation if there are other details that seems to differ between testaceus and tuvensis. And also if there is a description of the wings for testaceus. Tipuloides is not actual for this one I think. And a better picture of the wing here.
Posted by Sundew on 31-08-2016 22:47
#9
Now I took a deeper look into Zaitzev's paper from 1991 and especially his key. It seems that the only stressed difference between
K. testaceus and
K. tuvensis is the shape of the median ventral outgrowth of the gonocoxites. However, Kjærandsen et al. (2007) state that these differences are within the limits of variation in
K. testaceus and consider
K. tuvensis as well as
K. dispar probable junior synonyms of
K. testaceus - see p. 20 of
http://www.online...Sweden.pdf. If this is true, even preparation of the genitalia of your fly would not shed any more light on species identification. If you label it "
K. testaceus sensu lato" you are on the safe side!
Edited by Sundew on 31-08-2016 23:08
Posted by ebbek on 01-09-2016 08:11
#10
Yes, "K. testaceus sensu lato" seems to be the best choice at the moment! Thanks!
Krister